WHY SHOULD IMPACTED WISDOM TEETH BE EXTRACTED :
When a wisdom tooth is partially erupted, food and bacteria collect under the gum causing a local infection. This may result in bad breath, pain, swelling and trismus (inability to open the mouth fully). The infection can spread to involve the cheek and neck. Once the initial episode occurs, each subsequent attack becomes more frequent and more severe.
Pain may also come from the pressure of the erupting wisdom tooth against other teeth. In some cases this pressure may cause the erosion of these teeth.
Many younger patients have had prolonged orthodontic treatment to straighten teeth. Wisdom teeth may cause movement of teeth (particularly the front teeth) when they try to erupt and this will compromise the orthodontic result.
Patients who are to have dentures constructed should have any wisdom tooth removed. If a wisdom tooth erupts beneath a denture it will cause severe irritation and if removed, the patient will need to have a new denture constructed as the shape of the gum will have changed.
A cyst (fluid filled sac) can develop from the soft tissue around an impacted wisdom tooth. Cysts cause bone destruction, jaw expansion and displacement or damage to nearby teeth. The removal of the tooth and cyst is necessary to prevent further bone loss. Rarely, tumors may develop within these cysts or the jaw may fracture spontaneously if the cyst grows very large.